James chase



arent titre'.

JAMES o -H Asn, lor' nocrinsrnn New Yoan.- Lclfers Partant No; 63,213, dated March 26, 1867.

IMPROVEMENT IN'WOOD-TURNING LATHES.

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n fro ALL wH'oM rr MAY ooncnnn:

Be ,it known that I, JAMES'CHASE, of Rochester, inlthe countyl of Monroe, and State of' New York, have invented a new and useful Cutting Apparatus for Wood Lathes; and I do hereby declare that-.the following is aifuvll, clear, and exact description of the construction and operation of the same, reference being had to the annexed drawings, making a part of this'speciiication, in whicli Figure 1 is a side elevation'of a wood lathe provided with my improvements.

'Figure 2,0. plan ofthe same.

Figure 3, a diagram representing a lcross-section of thecarriage and cutters.

Figure 4, a plan of the rotaryknife and its frame, detached. n

Figures 5 and 6 are4 end views of the knife,` showing modifications ofthe cutters.l

Like letters ofreferen'ce indicate corresponding parts inail the iigures.

AMy 'inventiPon has reference more particularly to a rotary knife for cutting ornamental work iu woodturn ingv lathes. I l l i I j i As represented in the drawings, A is the bed'of auordinary wood-turningflathe, B the head-block,' and the tail-block. The bed is providedv with ways, a a, on which slides a carriage, D, holding the cutters byiwhichthe wood is turned. 'These cutters are three in number-#dren a roughin'g'knife, E, stationary inposition' on ,the carriage; second, a plain-work knife, G; Naud third, a circular rotating knife, H, for cutting. ornamental work, such as knurl, ogee, or bead. The-knives G and H are respectively provided w-ith arms, and I'Qbothjointed `or hinged to an axis, b, the former bowing over and resting on apattern, L, and the latter connecting` with va box, lli, which has a shaft, N`,'resting,on -a pattern, O. The rear end of said shaft has a weight, e, for holding it downen the pattern, and the 'front end has the circular head H, to which the cuttersf are secured. These cutters are of diiferentikinds and forms, to suit the conditions of the case. Thus, ingsl 3, 4, and 5, the cutters are represented of the regular corrugated fornito cut kuurl work, and in fig. 6 are representedseveral forms suited to cut a plain tenen, ogee, and bead work. The cutters are applied to the-head in sections-1,V 2, 3, being secured by means ofscrews and slots, g t. This lenables a. portion-.01 whole circle of the cutters to be employed,

by which the work in thewood may be at intervals or continuous, as the necessitie's'of the ease may require On the shaft N is secured a pinion, i, which gears with a eoglrack, P, extending longitudinally of the lathe, the opposite ends boing secured to swinging arms,` k 7c, as shown most clearly in iig. 3. 'By simply raising these arms, the cog-rack will at any time be Adisengaged from thel pinion, and consequently the knife II can lee-turned' or adjustedso as to present its cutters in any 'desired position to the wood whichthey cut.-

` The operation of this machine is as follows: The stick to befturned. having been fitted in the lathe, th cutting action is produced by feeding'tl-ie carriage. along on its ways. The roughing knife E takes off the surface, and turns the stick in the form Aadapted -to receive the action of the other knives. The pattern L, on which the arm I of the knife G rests,` is arranged on the predetermined formula necessary to turn theplain round work; forins'tanee, in a chair-round or 4a bedstead post, it will v turn the plain cylindrical and tapering portions of the proper form and extent. The irregularities of the pattern, of course, will exactly correspond with the irregularities of the stick. The cir'cular'knife H, which cuts the ornamental work, is simply adjusted so that it willcommence its cutting action at the .proper point `ofthe work by raising the cog-rack *from the pinion, as indicated by red lines, (iig. 3,) and turning it aroundtill the right position-is reached. Then, by dropping the cog-rack upon the pinion again, the-knifejwill revolve as the carriage isfed forward, and cut to the extent of the cutting edge o f the knife. The pattern 0,'onwhich thezshaft N of the knifeY rests, is so formed as simply to throw the cutting edge in contact with the stick at the proper position, andhas no reference in its particularv form to the ornamental form of 'the work produced in the-wood.` This is accomplished only `by the form ofthe cutting edge ofthe knifel itself. The extreme diameter ofthe cutter should not eirceed that of the pinionj. By the employment of. the simply rotating'fknife as above described, armed with cutters of the proper shape, I am enabled to turn any regular ornamental form in 'the most expeditious manner and without the peradventure of a mistake. ".lhc lwhole is' automatic. 'I hcgreat advantage of this over ordinary fixed knives is at on'ce apparent. Besides this, wherever a change is required I am enabled to secure it in the most simple manner. I can limit the cnt exactly as desired by applying the cutters f in sections'. I can also set the cutters in any position by di" f i i :l i

raising th'eswinging cog-rack. .And by the, combination of the knives GH, I produce a-doub1e effect in turning two forms at once. The-patterns ,L O are simply screwed in place, so that their places may be filled readily by others. i

In ordinaryv'lathes for'turning irregular forms'rotary knives are employed, but the axes of such'knives usually stand parallel with the stiok'being turned, und therknives themselves simply revolve rapidly to cutthe wood away. It will be noticed that my rotary knife acts -in a very dillerent way, for its axis'stands at right angles, or nearly so, to the stick beinzgl turned, and its turning action is not positive to act'asa cnt terpbut it is simply fed along-'to produce a continuity or succession of cut, and the cutters stand to -lact in a manner similar to the ordinary chisel. It will also be noticed that my knifeis employed in combination 'with-,a sliding'carriage that carriesit over the irood, and with a pattern that guides its action;

AWhat claim as my invention, and desirc to secure by'fLettels'P-atent, is y The employment of a .pattern knife o'r cutter in woodturning lathes, rotating upon an airis arranged at right-angles, or nearly so, to that of the stick or timber which is beingV turned, and sc geared to the frame of the lathe as to leave its pattern upon the stick, substantially in tli'e manner and for the purposes set forth'.

V2. The employment of the pivoted box M,Vwl1ich constitutes the axial bearing for the knife-journal or shaft N, when the partsl are arranged and operate substantiallyin th'emanner and for the purposes herein shown and described. t

JAMES CHASE.

Witnesses:

P. T, TURNER, L., M. NEWTON. 

